Semiquantum approach for fast atom diffraction: Solving the rainbow divergence

In this work we introduce a distorted-wave method, based on the initial value representation approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the surface eikonal (SE) model for diffraction from crystal surfaces produced by grazing scattering...

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Autores principales: Gravielle, M.S., Miraglia, J.E.
Formato: JOUR
Materias:
Diffraction
Collision systems
Crystal surfaces
Fast atom diffractions
Grazing scattering
Initial value representation
Projectile distributions
Quantum evolution
Quantum interference
Atoms
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10502947_v90_n5_p_Gravielle
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_10502947_v90_n5_p_Gravielle2023-10-03T16:00:20Z Semiquantum approach for fast atom diffraction: Solving the rainbow divergence Gravielle, M.S. Miraglia, J.E. Diffraction Collision systems Crystal surfaces Fast atom diffractions Grazing scattering Initial value representation Projectile distributions Quantum evolution Quantum interference Atoms In this work we introduce a distorted-wave method, based on the initial value representation approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the surface eikonal (SE) model for diffraction from crystal surfaces produced by grazing scattering of fast atoms. The proposed theory, named the surface initial value representation (SIVR) approximation, is applied to He atoms colliding with a LiF(001) surface along low-indexed crystallographic channels. For this collision system the SIVR approach provides a very good representation of the quantum interference structures of experimental projectile distributions, even in the angular region around classical rainbow angles where the semiclassical SE method diverges. © 2014 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10502947_v90_n5_p_Gravielle
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Diffraction
Collision systems
Crystal surfaces
Fast atom diffractions
Grazing scattering
Initial value representation
Projectile distributions
Quantum evolution
Quantum interference
Atoms
spellingShingle Diffraction
Collision systems
Crystal surfaces
Fast atom diffractions
Grazing scattering
Initial value representation
Projectile distributions
Quantum evolution
Quantum interference
Atoms
Gravielle, M.S.
Miraglia, J.E.
Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
topic_facet Diffraction
Collision systems
Crystal surfaces
Fast atom diffractions
Grazing scattering
Initial value representation
Projectile distributions
Quantum evolution
Quantum interference
Atoms
description In this work we introduce a distorted-wave method, based on the initial value representation approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the surface eikonal (SE) model for diffraction from crystal surfaces produced by grazing scattering of fast atoms. The proposed theory, named the surface initial value representation (SIVR) approximation, is applied to He atoms colliding with a LiF(001) surface along low-indexed crystallographic channels. For this collision system the SIVR approach provides a very good representation of the quantum interference structures of experimental projectile distributions, even in the angular region around classical rainbow angles where the semiclassical SE method diverges. © 2014 American Physical Society.
format JOUR
author Gravielle, M.S.
Miraglia, J.E.
author_facet Gravielle, M.S.
Miraglia, J.E.
author_sort Gravielle, M.S.
title Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
title_short Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
title_full Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
title_fullStr Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
title_full_unstemmed Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
title_sort semiquantum approach for fast atom diffraction: solving the rainbow divergence
url http://hdl.handle.net/20.500.12110/paper_10502947_v90_n5_p_Gravielle
work_keys_str_mv AT graviellems semiquantumapproachforfastatomdiffractionsolvingtherainbowdivergence
AT miragliaje semiquantumapproachforfastatomdiffractionsolvingtherainbowdivergence
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